Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A communication control device, comprising: at least one processor configured to: acquire synchronization relation information that indicates which frequency bands are mutually synchronized among a plurality of frequency bands utilized for radio communication; control transmission of the synchronization relation information to a terminal device; control transmission of a signal with the plurality of frequency bands, wherein the plurality of frequency bands includes at least two frequency bands with which a common reference signal is not transmitted in at least one subframe among a plurality of subframes which are units of time in the radio communication; and control transmission of the common reference signal at different intervals with the at least two frequency bands.
2. The communication control device according to claim 1 , wherein the plurality of frequency bands includes at least one different frequency band with which the common reference signal is transmitted in each of the plurality of subframes, and the synchronization relation information at least further indicates which frequency band among the at least two frequency bands is synchronized with which frequency band among the at least one different frequency band.
This invention relates to wireless communication systems, specifically improving synchronization between different frequency bands in a network. The problem addressed is ensuring proper synchronization of reference signals across multiple frequency bands, which is critical for efficient communication and coordination in heterogeneous networks. The invention describes a communication control device that manages synchronization between multiple frequency bands in a wireless network. The device transmits a common reference signal across a plurality of frequency bands, where at least one frequency band in each subframe carries a different reference signal. The synchronization relation information provided by the device indicates which frequency bands are synchronized with which other frequency bands, including cases where different frequency bands are synchronized with at least one distinct frequency band in each subframe. This ensures that devices operating on different frequency bands can accurately align their timing and maintain coherent communication. The solution enhances synchronization accuracy by dynamically mapping frequency bands to reference signals in subframes, allowing for flexible and reliable synchronization across diverse network configurations. This is particularly useful in scenarios where multiple frequency bands are used simultaneously, such as in carrier aggregation or multi-band operations, to prevent interference and improve overall network performance. The invention ensures that synchronization information is clearly indicated, enabling devices to adjust their operations accordingly.
3. The communication control device according to claim 2 , wherein the at least two frequency bands include at least one synchronized frequency band synchronized with one of the at least one different frequency band, and the synchronization relation information at least further indicates which frequency band among the at least one synchronized frequency band is synchronized with which frequency band among the at least one different frequency band.
This invention relates to communication control devices that manage multiple frequency bands in wireless communication systems. The problem addressed is the need for efficient coordination between different frequency bands to avoid interference and optimize performance in complex wireless environments. The device controls communication across at least two frequency bands, where at least one of these bands is synchronized with another frequency band outside the primary set. The synchronization ensures that the frequency bands operate in a coordinated manner, preventing conflicts and improving data transmission reliability. The device generates synchronization relation information that specifies which frequency bands are synchronized with which external bands, allowing the system to dynamically adjust communication parameters based on these relationships. The synchronization relation information is used to manage communication settings, such as timing, power levels, and channel allocation, ensuring seamless operation across synchronized bands. This approach is particularly useful in multi-band wireless systems where different frequency bands must work together to maintain stable and efficient communication links. The invention enhances coordination between frequency bands, reducing interference and improving overall system performance.
4. The communication control device according to claim 1 , wherein the synchronization relation information at least further indicates which frequency bands among the at least two frequency bands are mutually synchronized.
This invention relates to communication control devices that manage synchronization between multiple frequency bands in wireless communication systems. The problem addressed is the need for efficient and precise synchronization control across different frequency bands to ensure reliable data transmission and reception in multi-band communication environments. The communication control device includes a synchronization control unit that establishes and manages synchronization relationships between at least two frequency bands. The synchronization relation information specifies which frequency bands are synchronized, ensuring that data transmission and reception are coordinated across these bands. Additionally, the synchronization relation information further indicates which specific frequency bands among the at least two frequency bands are mutually synchronized, allowing for fine-grained control over synchronization dependencies. This enables the device to dynamically adjust synchronization settings based on network conditions, reducing interference and improving overall communication efficiency. The device may also include a synchronization state monitoring unit to track synchronization status and a synchronization adjustment unit to modify synchronization relationships as needed. The invention enhances multi-band communication by providing detailed synchronization control, ensuring seamless data transfer and minimizing latency.
5. The communication control device according to claim 4 , wherein the plurality of frequency bands includes at least one different frequency band with which the common reference signal is transmitted in each of the plurality of subframes, the at least two frequency bands include at least two unsynchronized frequency bands synchronized with none of the at least one different frequency band, and the synchronization relation information at least further indicates which frequency bands are mutually synchronized among the at least two unsynchronized frequency bands.
This invention relates to wireless communication systems, specifically addressing synchronization and signal transmission across multiple frequency bands. The problem solved involves managing synchronization in heterogeneous networks where different frequency bands may operate asynchronously, leading to interference or inefficient resource allocation. The communication control device manages multiple frequency bands, each used for transmitting a common reference signal in different subframes. At least one frequency band is dedicated to transmitting the common reference signal in each subframe, ensuring consistent signal availability. Additionally, at least two frequency bands are unsynchronized, meaning they do not align with the timing of the dedicated frequency band. The device generates synchronization relation information that specifies which of these unsynchronized frequency bands are mutually synchronized with each other, allowing the network to coordinate transmissions and avoid conflicts. This approach enables flexible frequency band management in wireless networks, particularly in scenarios where different bands operate independently or with partial synchronization. By explicitly indicating synchronization relationships, the system can optimize signal transmission, reduce interference, and improve overall communication efficiency. The solution is particularly useful in heterogeneous networks where multiple frequency bands coexist with varying synchronization requirements.
6. The communication control device according to claim 4 , wherein each of the plurality of frequency bands is a frequency band with which the common reference signal is not transmitted in the at least one subframe among the plurality of subframes.
This invention relates to wireless communication systems, specifically improving signal transmission efficiency in scenarios where common reference signals (CRS) are not transmitted in certain subframes. The problem addressed is the inefficient use of frequency bands during subframes where CRS is absent, leading to underutilized spectrum resources. The communication control device manages multiple frequency bands in a wireless network. Each frequency band is selected such that no common reference signal is transmitted in at least one subframe among a plurality of subframes. This allows the device to dynamically allocate these frequency bands for data transmission or other purposes, optimizing spectrum usage. The device may also control the transmission of other signals, such as synchronization signals or broadcast channels, in these frequency bands, ensuring compatibility with existing communication protocols. By avoiding frequency bands where CRS is present, the device prevents interference and ensures reliable signal transmission. The system may include multiple antennas to enhance signal quality and coverage. The invention is particularly useful in LTE or 5G networks where CRS transmission is selectively disabled in certain subframes to reduce overhead or improve efficiency. The device may also coordinate with other network components to manage frequency band allocation dynamically, adapting to real-time network conditions. This approach improves overall network performance by maximizing spectrum utilization while maintaining signal integrity.
7. The communication control device according to claim 1 , wherein the at least two frequency bands include at least two frequency bands that are mutually synchronized, the common reference signal is transmitted in the at least one subframe with a first set of frequency bands among the at least two mutually synchronized frequency bands, and the common reference signal is not transmitted in the plurality of subframes with a second set of frequency bands among the at least two mutually synchronized frequency bands, wherein the second set of frequency bands is different from the first set of frequency bands.
This invention relates to wireless communication systems, specifically to managing reference signal transmission in synchronized frequency bands. The problem addressed is inefficient use of resources when transmitting common reference signals across multiple synchronized frequency bands, leading to unnecessary overhead and reduced capacity. The invention describes a communication control device that operates in a system using at least two synchronized frequency bands. A common reference signal is transmitted in at least one subframe using a first subset of these bands, while the same reference signal is omitted in multiple subframes for a second subset of bands. The second subset is distinct from the first, ensuring that reference signals are not redundantly transmitted across all synchronized bands. This selective transmission reduces overhead while maintaining synchronization and signal quality. The device ensures that the synchronized bands remain aligned in time, allowing coordinated communication without transmitting reference signals in every band for every subframe. This approach optimizes resource allocation, particularly in systems where multiple bands are synchronized but do not require continuous reference signal transmission across all bands. The invention improves spectral efficiency and reduces interference by avoiding redundant transmissions.
8. The communication control device according to claim 1 , wherein the at least two frequency bands include at least two frequency bands that are mutually synchronized, the terminal device monitors a synchronization state of the terminal device in a first set of frequency bands among the at least two mutually synchronized frequency bands, and does not monitor the synchronization state of the terminal device in a second set of frequency bands among the at least two mutually synchronized frequency bands, and the second set of frequency bands is different from the first set of frequency bands.
This invention relates to wireless communication systems, specifically improving synchronization efficiency in multi-band networks. The problem addressed is the unnecessary power consumption and processing overhead when terminal devices monitor synchronization signals across all available frequency bands, even when some bands are synchronized with others. The communication control device manages synchronization monitoring in a network where at least two frequency bands are mutually synchronized. A terminal device monitors its synchronization state in a first set of these synchronized bands but does not monitor synchronization in a second, distinct set of bands. This selective monitoring reduces energy consumption and processing load while maintaining reliable synchronization across the network. The synchronized bands allow the terminal device to infer synchronization status in the unmonitored bands based on the monitored bands, eliminating redundant checks. This approach is particularly useful in scenarios where multiple frequency bands are coordinated, such as in carrier aggregation or multi-band handover operations, where synchronization can be derived from a subset of bands. The invention optimizes resource usage by leveraging synchronized band relationships, ensuring efficient synchronization without compromising network performance.
9. The communication control device according to claim 1 , wherein the at least two frequency bands include a first frequency band of a low interval with which the common reference signal is transmitted at a first interval in a time direction and a second frequency band of a high interval with which the common reference signal is transmitted at a second interval, the second interval is higher than the first interval in the time direction, and the at least one processor is further configured to control the transmission of the common reference signal such that the common reference signal is transmitted with the first frequency band in subframes of the plurality of subframes in which the common reference signal is transmitted with the second frequency band.
This invention relates to wireless communication systems, specifically improving the transmission of common reference signals (CRS) across multiple frequency bands to enhance signal reliability and efficiency. The problem addressed is the need for flexible and adaptive reference signal transmission to support diverse communication scenarios, such as varying channel conditions or different service requirements. The invention describes a communication control device that manages the transmission of CRS across at least two frequency bands. The first frequency band operates at a low interval, meaning the CRS is transmitted less frequently in the time domain. The second frequency band operates at a high interval, meaning the CRS is transmitted more frequently. The device ensures that the CRS is transmitted in the first frequency band during subframes where it is also transmitted in the second frequency band. This approach allows for efficient resource utilization while maintaining signal quality. The device includes at least one processor configured to control the transmission of the CRS, ensuring that the signals in the first frequency band align with those in the second frequency band in specific subframes. This alignment helps optimize signal reception and reduce overhead, particularly in scenarios where different frequency bands are used for different purposes, such as control and data channels. The solution improves system performance by balancing transmission frequency and resource allocation.
10. The communication control device according to claim 1 , wherein the at least one processor is further configured to: acquire synchronizability determination information utilized to determine whether the terminal device is capable of being synchronized in each of the at least two frequency bands; and control transmission of the synchronizability determination information to the terminal device.
This invention relates to wireless communication systems, specifically improving synchronization between terminal devices and base stations across multiple frequency bands. The problem addressed is ensuring reliable synchronization when a terminal device operates in different frequency bands, which can vary in signal quality and interference conditions. The communication control device includes at least one processor configured to manage synchronization processes. The processor acquires synchronizability determination information, which assesses whether a terminal device can maintain synchronization in each of the at least two frequency bands. This information is then transmitted to the terminal device to enable it to adjust its operations accordingly. The synchronizability determination may involve evaluating signal strength, interference levels, or other factors that affect synchronization stability. By providing this information, the terminal device can optimize its frequency band selection and synchronization mechanisms, reducing connection drops and improving overall communication reliability. The invention enhances synchronization control in multi-band wireless networks, particularly in scenarios where terminal devices switch between frequency bands or operate in environments with varying signal conditions.
11. The communication control device according to claim 10 , wherein the synchronizability determination information includes information regarding a transmission interval of the common reference signal in each of the at least two frequency bands.
This invention relates to communication control devices for managing wireless communications across multiple frequency bands. The problem addressed is ensuring reliable synchronization and communication in systems where devices operate across different frequency bands, which can introduce challenges in maintaining signal integrity and coordination. The communication control device determines the synchronizability of a target device by evaluating synchronizability determination information. This information includes details about the transmission interval of a common reference signal in each of the at least two frequency bands. The device assesses whether the target device can maintain synchronization based on these intervals, ensuring stable communication. Additionally, the device may adjust communication parameters, such as transmission power or timing, to optimize performance across the frequency bands. The system may also prioritize certain frequency bands or signals to enhance synchronization accuracy. By analyzing the transmission intervals of the common reference signal, the device ensures that the target device can reliably operate in a multi-band environment, reducing errors and improving overall communication efficiency.
12. The communication control device according to claim 10 , wherein the synchronizability determination information includes information regarding communication quality recommended in each of the at least two frequency bands.
This invention relates to communication control devices that manage wireless communication across multiple frequency bands. The problem addressed is ensuring reliable and efficient communication by determining the synchronizability of devices operating in different frequency bands, particularly in scenarios where devices may switch between bands or operate in overlapping coverage areas. The communication control device evaluates synchronizability by analyzing information related to communication quality in each frequency band. This includes assessing recommended quality metrics such as signal strength, latency, or error rates to determine whether devices can maintain synchronized communication when operating in different bands. The device may also consider factors like interference levels, bandwidth availability, or device capabilities to optimize synchronization. By incorporating communication quality recommendations for each frequency band, the device ensures that devices can seamlessly transition between bands or coexist without synchronization issues. This is particularly useful in heterogeneous networks where devices may operate in licensed and unlicensed bands, or in scenarios where dynamic spectrum access is required. The solution enhances network reliability and performance by dynamically adjusting communication parameters based on real-time quality assessments.
13. The communication control device according to claim 10 , wherein the synchronizability determination information includes information regarding power control of each of the at least two frequency bands.
This invention relates to communication control devices that manage synchronization between multiple frequency bands in wireless communication systems. The problem addressed is ensuring reliable synchronization across different frequency bands, which is critical for maintaining stable communication links in environments where signal interference or power variations can disrupt coordination between bands. The communication control device includes a synchronization controller that determines the synchronizability of at least two frequency bands based on synchronizability determination information. This information includes details about the power control of each frequency band, allowing the device to assess whether the bands can be synchronized effectively. The synchronization controller adjusts synchronization parameters, such as timing or phase alignment, to maintain coordination between the bands. The device may also include a synchronization state manager that monitors the synchronization status of the bands and a synchronization parameter adjuster that modifies synchronization settings based on the determined synchronizability. By incorporating power control information into the synchronizability assessment, the device can dynamically adapt to changes in signal strength or interference, ensuring robust synchronization across multiple frequency bands. This is particularly useful in wireless systems where frequency bands may experience varying conditions, such as in heterogeneous networks or multi-band communication scenarios. The invention improves communication reliability by dynamically adjusting synchronization based on real-time power control data.
14. The communication control device according to claim 1 , wherein the at least one processor is further configured to control the transmission of the common reference signal at different intervals in at least two frequency bands that are mutually synchronized among the at least two frequency bands.
This invention relates to wireless communication systems, specifically to a communication control device that manages the transmission of common reference signals (CRS) across multiple synchronized frequency bands. The problem addressed is the need for efficient and synchronized CRS transmission in multi-band wireless networks to improve signal reliability and reduce interference. The communication control device includes at least one processor configured to control the transmission of CRS at different intervals in at least two frequency bands. These frequency bands are mutually synchronized, meaning their timing and transmission parameters are aligned to ensure coherent operation. The device ensures that the CRS, which are essential for channel estimation and synchronization in wireless communications, are transmitted in a coordinated manner across the bands. This synchronization helps maintain signal integrity and reduces the risk of interference between bands. The processor may also adjust transmission parameters, such as power levels or modulation schemes, to optimize performance based on network conditions. The synchronized transmission of CRS at varying intervals allows for flexible resource allocation while maintaining reliable communication links. This approach is particularly useful in scenarios where multiple frequency bands are used to increase capacity or coverage in wireless networks. The invention enhances system efficiency by ensuring that reference signals are transmitted in a controlled and synchronized manner across different bands.
15. A non-transitory computer-readable medium having stored thereon computer-executable instructions that, when executed by a computer, cause at least one processor of the computer to execute operations, the operations comprising: acquiring synchronization relation information indicating which frequency bands are mutually synchronized among a plurality of frequency bands utilized for radio communication; controlling transmission of the synchronization relation information to a terminal device; controlling transmission of a signal with the plurality of frequency bands, wherein the plurality of frequency bands includes at least two frequency bands with which a common reference signal is not transmitted in at least one subframe among a plurality of subframes which are units of time in the radio communication; and controlling transmission of the common reference signal at different intervals at with the at least two frequency bands.
This invention relates to wireless communication systems, specifically addressing synchronization and reference signal transmission across multiple frequency bands. The problem solved is ensuring efficient synchronization and reference signal management in systems using multiple frequency bands where common reference signals (CRS) are not transmitted in every subframe. The system acquires synchronization relation information, which indicates which frequency bands are mutually synchronized among a plurality of frequency bands used for radio communication. This information is transmitted to terminal devices to inform them of the synchronization status between bands. The system also transmits signals across these frequency bands, including at least two bands where a common reference signal is not transmitted in at least one subframe. To maintain synchronization and signal quality, the system controls the transmission of the common reference signal at different intervals for these two frequency bands. This approach allows for flexible synchronization and reference signal management, improving efficiency in multi-band communication systems where CRS transmission is not uniform across all subframes. The solution ensures that terminal devices can accurately track synchronization and reference signals even when CRS are not continuously transmitted in all bands.
16. A communication control method, comprising: acquiring, by at least one processor, synchronization relation information indicating which frequency bands are mutually synchronized among a plurality of frequency bands utilized for radio communication; controlling, by the at least one processor, transmission of the synchronization relation information to a terminal device; controlling transmission of a signal with the plurality of frequency bands, wherein the plurality of frequency bands includes at least two frequency bands with which a common reference signal is not transmitted in at least one subframe among a plurality of subframes which are units of time in the radio communication; and controlling transmission of the common reference signal at different intervals at with the at least two frequency bands among the.
This invention relates to radio communication systems where multiple frequency bands are used, addressing the challenge of managing synchronization and reference signals efficiently. The method involves acquiring synchronization relation information that specifies which frequency bands are mutually synchronized among the plurality of frequency bands used for communication. This information is then transmitted to terminal devices to inform them of the synchronization status across the bands. The system controls the transmission of signals across these frequency bands, where at least two of the bands do not transmit a common reference signal in at least one subframe—a time unit in radio communication. To compensate for this, the common reference signal is transmitted at different intervals in these two frequency bands. This approach ensures that terminal devices can still maintain synchronization and perform accurate channel estimation despite the absence of the common reference signal in certain subframes. The method optimizes resource usage by avoiding redundant reference signal transmissions while maintaining reliable communication across multiple frequency bands. This is particularly useful in scenarios where spectrum efficiency and synchronization accuracy are critical, such as in advanced wireless networks.
17. A terminal device, comprising: at least one processor configured to: receive synchronization relation information that indicates which frequency bands are mutually synchronized among a plurality of frequency bands utilized for radio communication; synchronize the plurality of frequency bands based on the synchronization relation information; receive a signal with the plurality of frequency bands, wherein the plurality of frequency bands includes at least two frequency bands with which a common reference signal is not transmitted in at least one subframe among a plurality of subframes which are units of time in the radio communication; and receive the common reference signal at different intervals with the at least two frequency bands among the at least two frequency bands.
A terminal device is designed for radio communication across multiple frequency bands, addressing challenges in synchronization and reference signal management. The device includes a processor that receives synchronization relation information specifying which frequency bands are mutually synchronized among a plurality of frequency bands used for communication. The processor then synchronizes these frequency bands based on the received information. The terminal is configured to receive signals across the synchronized frequency bands, which include at least two bands where a common reference signal is not transmitted in at least one subframe—a time unit in radio communication. To ensure reliable signal reception, the terminal receives the common reference signal at different intervals in these two frequency bands. This approach optimizes synchronization and reference signal handling, particularly in scenarios where reference signals are not uniformly available across all subframes, improving communication efficiency and reliability. The solution is applicable in multi-band communication systems where maintaining synchronization and managing reference signals are critical for performance.
18. A communication control device, comprising: at least one processor configured to: control transmission of a signal in a plurality of frequency bands utilized for radio communication, wherein the plurality of frequency bands includes at least two frequency bands with which a common reference signal is not transmitted in at least one subframe among a plurality of subframes which are units of time in the radio communication; control the transmission of the common reference signal at different intervals with the at least two frequency bands; acquire synchronizability determination information utilized to determine whether a terminal device is capable of being synchronized in each of the at least two frequency bands; and control transmission of the synchronizability determination information to the terminal device.
This invention relates to wireless communication systems, specifically addressing challenges in managing reference signals across multiple frequency bands. The problem solved involves ensuring efficient synchronization of terminal devices in scenarios where common reference signals (CRS) are not transmitted in all subframes across different frequency bands. The device includes a processor that controls signal transmission in multiple frequency bands, where at least two bands lack CRS in certain subframes. To maintain synchronization, the processor transmits CRS at varying intervals in these bands. Additionally, the device acquires and transmits synchronizability determination information to terminal devices, enabling them to assess whether they can synchronize with each frequency band. This approach optimizes resource usage while ensuring reliable communication by dynamically adjusting reference signal transmission and providing terminals with necessary synchronization data. The solution is particularly useful in heterogeneous networks where different bands may have varying signal conditions or operational constraints.
19. A terminal device, comprising: at least one processor configured to: select a frequency band, for radio communication of the terminal device, among a plurality of frequency bands, wherein the plurality of frequency bands includes at least two frequency bands with which a common reference signal is not received in at least one subframe among a plurality of subframes which are units of time in the radio communication; receive the common reference signal at different intervals with the at least two frequency bands; and receive synchronizability determination information utilized to determine whether the terminal device is capable of being synchronized in each of the at least two frequency bands.
This invention relates to wireless communication systems, specifically addressing challenges in terminal devices operating across multiple frequency bands where common reference signals (CRS) are not consistently received. The problem arises when a terminal device must select an optimal frequency band for communication, but some bands lack CRS in certain subframes, making synchronization and signal quality assessment difficult. The terminal device includes at least one processor configured to select a frequency band from multiple available bands, where at least two of these bands do not receive a common reference signal in at least one subframe. The processor receives the CRS at different intervals across these bands, allowing the device to assess signal conditions despite irregular CRS availability. Additionally, the terminal device receives synchronizability determination information, which helps evaluate whether the device can maintain synchronization in each of the frequency bands. This information enables the device to make informed decisions about band selection, ensuring reliable communication even when CRS is intermittently unavailable. The solution improves flexibility and robustness in wireless networks by enabling terminals to adapt to varying signal conditions across different frequency bands.
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May 12, 2020
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